Top reasons for Poor Software Quality

From Datamation

Just missing this list but deserving of attention are breakdowns in coordination among distributed software teams, a cause that would make the top five in some environments.

In well run software organisations testing is not a defect detection activity. Rather, testing should merely verify that the software performs correctly under a wide range of operational conditions. By understanding and addressing the top five causes of defects, quality can be designed in from the start, substantially reducing both the 40% of project effort typically spent on rework and the risks to which software exposes business.